#!/usr/bin/env python3
# coding: utf-8

import numpy as np
import cv2 as cv
img = np.zeros((500,500,3),np.uint8)
cv.ellipse(img,(256,256),(100,50),0,0,360,(255,255,0),-1)

cv.imshow('img',img)
cv.waitKey(0)
cv.destroyAllWindows()